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WO2008041097A2 - Suspension cord winding device for a shutter - Google Patents

Suspension cord winding device for a shutter Download PDF

Info

Publication number
WO2008041097A2
WO2008041097A2 PCT/IB2007/002901 IB2007002901W WO2008041097A2 WO 2008041097 A2 WO2008041097 A2 WO 2008041097A2 IB 2007002901 W IB2007002901 W IB 2007002901W WO 2008041097 A2 WO2008041097 A2 WO 2008041097A2
Authority
WO
WIPO (PCT)
Prior art keywords
cord
groove
drum
winding
locking means
Prior art date
Application number
PCT/IB2007/002901
Other languages
French (fr)
Other versions
WO2008041097A3 (en
Inventor
Eric Lagarde
Norbert Dupielet
Original Assignee
Somfy Sas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Somfy Sas filed Critical Somfy Sas
Priority to EP07805013A priority Critical patent/EP2076651A2/en
Publication of WO2008041097A2 publication Critical patent/WO2008041097A2/en
Publication of WO2008041097A3 publication Critical patent/WO2008041097A3/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
    • E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
    • E06B9/32—Operating, guiding, or securing devices therefor
    • E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • E06B2009/3227—Axially moving rollers

Definitions

  • the invention relates to a suspension cord winding device comprising a winding drum on which is fixed the end of at least one suspension cord.
  • a helical groove is disposed on the outer surface of the drum.
  • a guiding means makes it possible to position the cord in the groove during winding.
  • Blinds whether they be canvases, venetian blinds, pleated blinds or other, generally comprise two suspension cords, one end of which is fixed to the winding drum and the other end is fixed to the free end. of the awning.
  • the object of the invention is to provide a blind suspension cord winding device remedying the disadvantages mentioned above and improving the blind suspension cord winding devices known from the prior art.
  • the invention proposes a blind suspension cord winding device to avoid the phenomena of overlapping turns and locking of the winding device.
  • the blind suspension cord winding device is defined by claim 1.
  • FIG. 1 is a representation of an installation comprising two winding devices according to the invention
  • FIG. 2 is a partial view of a first embodiment of a winding device according to the invention
  • FIG. 3 is a partial sectional view along line II of FIG. 2
  • FIG. 4 is a section of a helical groove of a second embodiment of a winding device according to the invention
  • FIG. 5 is a partial section of a winding drum forming part of a variant of the second embodiment of a winding device according to the invention
  • FIG. 6 is a partial view in half-section along the line III.
  • FIG. 7 of a third embodiment of a winding device according to the invention FIG. 7 is a partial sectional view along the line H-II of FIG. 6 of the third embodiment of FIG. a winding device according to the invention.
  • the winding cord 10 of the invention is intended to be integrated in an installation 1 as shown in FIG. 1.
  • This installation can be a motorized venetian blind comprising a load bar 2 and orientable blades.
  • the load bar 2 is connected to the winding devices 10 by two cords 4.
  • Each winding device 10 comprises a drum 11 having a helical groove in which is housed the corresponding bead 4 and a guide means 12 allowing position the cord in the groove.
  • the two drums 11 are interconnected by a shaft 5.
  • This shaft 5 is rotated by a drive means 6 which can be a manual control or a motor.
  • Blade orientation means may also be provided. It can be independent of the winding device or be associated with it.
  • the winding devices 10 and the driving means 6 are integrally arranged inside a box 7.
  • Two kinematics are possible for the winding of the cord.
  • the guide means 12 is fixed and the drum 11, rotated by the shaft 5, is free in axial translation with respect to this shaft 5.
  • the guide means 12 comprises a fixed shape complementary to the groove being housed in it.
  • the second alternative reverses the kinematics.
  • the guide means 12 becomes mobile in translation but locked in rotation while the drum 11 becomes fixed in translation but still rotated by the shaft 5.
  • the principle of the invention is to provide in a groove of the drum a blocking means integral with the drum.
  • This locking means makes it possible to deliberately hold the cord in the groove of the drum. In the case where the locking means exerts a direct force on the cord, this effort is controlled and determined.
  • integral is meant that any movement of the drum causes a movement of the locking means.
  • the connection between the locking means and the drum is of the embedding type and is for example made by molding the drum with the locking means or by any other means for fixing the locking means on the drum.
  • the locking means is integral with the drum permanently.
  • FIGS 2 and 3 show in detail a first embodiment of the winding device according to the invention.
  • the cord 4 is held in the groove 11 R by means of a helical spring 13 with a variable helix angle.
  • the portions of turns between which the bead must be stuck have a helix angle equal to or substantially equal to the angle of the groove.
  • the complementary portions of the turns have a different helix angle so that the pitch of the spring is equal to the pitch of the groove.
  • the helix angle changes continuously along the spring.
  • the spring is housed in a recess 11 E of the drum 11. The recess extends for example axially on the drum along the groove.
  • the cord 4 is secured to the drum 11 on the side A by pinching effect of the cord between two successive turns of the spring.
  • the cord 4 wraps around it by placing itself in the groove 11 R.
  • the spring 13 is dimensioned and positioned in the recess 11 E so that the cord 4 is clamped between two turns of the spring 13 when it passes through.
  • the helical groove 11 R is discontinuous, interspersed with space corresponding to the recess 11 E. When the cord passes through this space, it is pinched by two turns of the spring 13 housed in this recess. Several conditions are thus necessary.
  • the gap between two successive turns is smaller than the diameter of the cord.
  • the pitch of the helix of the groove is equal to or is a multiple of the pitch of the spring.
  • the bead will jam in the spring every n turns of the spring.
  • the outer radius of the spring R13 added to the spacing E between the drum 11 and the spring 13 is preferably greater than or equal to the outside radius of winding of the cord Re4.
  • means are provided to prevent rotation of the spring relative to its axis relative to the drum.
  • Other springs may be disposed on the periphery of the drum to increase the holding of the cord. With this type of design, the spring is interchangeable which allows to better control the clamping force and to wind cords of different diameters (with a suitable spring size).
  • the spring may be of the helical type with a constant helix angle.
  • the helix angle of the spring is different from that of the groove and, in addition to the wedging effect between the turns of the spring, there is a baffle effect when the cord goes from the groove to the spring and or from the spring to the groove.
  • Figure 4 shows a second embodiment of the winding device.
  • the cord 4 is trapped in a helical groove 11 R '.
  • the walls 20 of the section of the groove are closed so that the cord can not leave the section without effort.
  • the walls 20 are closed by the presence at their outer ends of two extensions 21 extending axially.
  • the opening O of the groove defined by the distance between two extensions 21 of the groove is smaller than the diameter D4 of the bead.
  • These extensions 21 may be continuous throughout the groove or discontinuous, on defined areas, every half-turns, for example.
  • the section can be closed permanently or closed once the cord 4 is in the section, zipper type system.
  • the drum 11 has a helix 40 with an L section.
  • This helix can be continuous or discontinuous.
  • the turns or portions of turn are connected to the hub of the drum 11 by hinges 41. They are bistable.
  • the two portions shown on the left occupy a first stable position C and the two portions represented on the right occupy a second stable position D.
  • Means (not shown) make it possible to tilt the portions between the two positions over the rotation of the drum.
  • the winding groove of the bead is formed by the gap between the turns of the propeller 40. The gap between two turns does not occupy the same stable position is much greater than that existing between two turns occupying stable positions D.
  • the bead can be retained between the different turns occupying the position D and can leave or come to wind without stress on the drum at the level of interstice separating two turns not occupying the same position.
  • the blocking means can only prevent the bead from coming out of the groove.
  • the cord is, in this case, free movement within the section of the groove which allows, with a suitable section, to equip the device cords of different sizes.
  • FIG. 6 A third embodiment of the winding device is shown in Figures 6 and 7.
  • the bead is pinched by clamping between walls 11 P1, 11 P2 deformable side of a groove 11 R ".
  • the cord 4 is located in the groove 11 R ", as described in the first embodiment.
  • the cord will deform the side walls 11 P1, 11 P2 of the groove until the cord is pressed against a stop, for example a rib 11 N.
  • the winding is regular , the inner winding diameter is constant and corresponds to the Rb4 dimension of the abutment.
  • the deformed walls apply, in return, efforts on the bead 4 which, taking into account the coefficient of friction at the cord-wall interface, prevents the cord out of the groove 11 R "as a radial force of a certain intensity is not achieved.
  • an interstitial space 11 E1 is provided between two consecutive walls
  • the side walls 11 P1 and 11 P2 deform in the interstitial space by the action of the cord.This deformation does not affect the pressure exerted on the cord in other sections of the groove. It is preferable that the deformation of these walls is elastic.
  • the nip allows it to push it outside the box, that is to say, in the box, the cord remains in the groove section and then leaves the section at the guiding means.
  • the risk of overlap is thus reduced.
  • the advantage of a continuous pinch is the absence of loose parts in the box. The risk of overlap is therefore non-existent.
  • the winding diameter of the bead is constant, which is essential to maintain the horizontality of a load bar moved by identical drums.
  • the groove is in the shape of a "U".
  • U is meant a section having two side walls for applying pressure on the cord, the other sides may take different forms.
  • the invention provides a device for holding the cord in the groove of the drum during a maneuvering the blind with a locking means which prevents the cord from leaving the section of the groove of the drum.
  • This means being integral with the drum, the risk of blocking the device is then reduced.
  • the cord can be partially held, that is to say it is not maintained continuously along the groove.
  • One advantage may be the simplification of the realization of the drum.
  • the locking means it would be preferable for the locking means to be arranged every U-turns, to facilitate the demolding of a possible drum made of plastic.
  • a standard helical groove provided in a winding drum and in which the bead would accidentally jam is obviously not a locking means integral with the drum.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

The suspension cord (4) winding device (10) for a shutter comprises a winding drum (11) to which the end of at least one suspension cord is attached, said drum having on the outer surface of the drum a helical groove (11R) to house said suspension cord and a guide means (12) for positioning the cord in the groove during winding. It is characterized in that the cord is held in the groove by a locking means (13) connected to the drum.

Description

Dispositif d'enroulement de cordon de suspension de store. Curtain suspension cord winding device.
L'invention concerne un dispositif d'enroulement de cordon de suspension comprenant un tambour d'enroulement sur lequel est fixée l'extrémité d'au moins un cordon de suspension. Une rainure hélicoïdale est disposée sur la surface extérieure du tambour. Un moyen de guidage permet de positionner le cordon dans la rainure lors de l'enroulement.The invention relates to a suspension cord winding device comprising a winding drum on which is fixed the end of at least one suspension cord. A helical groove is disposed on the outer surface of the drum. A guiding means makes it possible to position the cord in the groove during winding.
Les stores, qu'il s'agisse de toiles, de stores vénitiens, de stores plissés ou autres, comportent généralement deux cordons de suspension dont une extrémité est fixée au tambour d'enroulement et l'autre extrémité est fixée à l'extrémité libre du store. Afin d'assurer un enroulement et un déroulement régulier du store, c'est-à-dire une descente et une montée égales des deux côtés du store pour des raisons d'esthétique et des raisons mécaniques (risque de coincement), il est nécessaire d'assurer un enroulement régulier des deux cordons de suspension sur les tambours d'enroulement, en spires régulières, sans chevauchement. A cet effet, il est connu d'animer le tambour d'enroulement d'un mouvement de translation simultané au mouvement de rotation et d'amplitude telle que cette translation soit au moins égale à la valeur du diamètre du cordon par tour de tambour. Une solution, décrite dans plusieurs brevets et notamment dans la demande US 6,158,494 A1 , consiste à enrouler le cordon dans une rainure hélicoïdale pratiquée sur le tambour. Le cordon est alors guidé comme souhaité, lorsqu'il est enroulé autour du tambour. Lors de la descente, le poids de la barre de charge permet de maintenir le cordon dans la rainure du tambour. Cependant, dans le cas où l'écran rencontre un obstacle, le cordon peut quitter la rainure du tambour si celui-ci continue de tourner. En se déroulant à l'intérieur du caisson, le cordon peut alors se chevaucher et provoquer les désagréments cités précédemment. Ce phénomène est d'autant plus probable lorsque le mouvement est motorisé car l'obstacle n'est pas forcément détecté ou « vu » et donc un ordre d'arrêt n'est pas systématique exécuté. Pour pallier ce problème, une solution est illustrée dans les documents DE 1 509 779, US 3,181 ,595 et FR 1 286 899 où le cordon est recouvert par un capot : un tube. Cette pièce est nécessairement longue, encombrante et coûteuse. D'autre part, le tambour et ce capot tournent l'un par rapport à l'autre. Par conséquent, s'il y a un jeu trop important entre ces deux pièces, le cordon peut venir se coincer dans cet espace et bloquer le dispositif.Blinds, whether they be canvases, venetian blinds, pleated blinds or other, generally comprise two suspension cords, one end of which is fixed to the winding drum and the other end is fixed to the free end. of the awning. In order to ensure a uniform winding and unwinding of the awning, that is to say an equal descent and rise on both sides of the awning for reasons of aesthetics and mechanical reasons (risk of jamming), it is necessary to ensure a regular winding of the two suspension cords on the winding drums, in regular turns, without overlapping. For this purpose, it is known to animate the winding drum with a simultaneous translational movement to the rotational movement and amplitude such that this translation is at least equal to the value of the diameter of the bead per drum revolution. One solution, described in several patents and in particular in the application US 6,158,494 A1, is to wind the cord in a helical groove formed on the drum. The cord is then guided as desired when wrapped around the drum. During the descent, the weight of the load bar keeps the cord in the groove of the drum. However, in the event that the screen encounters an obstacle, the cord may leave the groove of the drum if it continues to rotate. By taking place inside the box, the cord can then overlap and cause the inconvenience mentioned above. This phenomenon is even more likely when the movement is motorized because the obstacle is not necessarily detected or "Seen" and therefore a stop order is not systematically executed. To overcome this problem, a solution is illustrated in DE 1 509 779, US 3,181, 595 and FR 1 286 899 where the cord is covered by a cover: a tube. This piece is necessarily long, cumbersome and expensive. On the other hand, the drum and hood turn relative to each other. Therefore, if there is too much play between these two parts, the cord can get caught in this space and block the device.
Le but de l'invention est de fournir un dispositif d'enroulement de cordon de suspension de store remédiant aux inconvénients évoqués ci-dessus et améliorant les dispositifs d'enroulement de cordon de suspension de store connus de l'art antérieur. En particulier, l'invention propose un dispositif d'enroulement de cordon de suspension de store permettant d'éviter les phénomènes de chevauchement de spires et de blocage du dispositif d'enroulement.The object of the invention is to provide a blind suspension cord winding device remedying the disadvantages mentioned above and improving the blind suspension cord winding devices known from the prior art. In particular, the invention proposes a blind suspension cord winding device to avoid the phenomena of overlapping turns and locking of the winding device.
Selon l'invention, le dispositif d'enroulement de cordon de suspension de store est défini par la revendication 1.According to the invention, the blind suspension cord winding device is defined by claim 1.
Différents modes de réalisation du dispositif sont définis par les revendications dépendantes 2 à 7.Different embodiments of the device are defined by dependent claims 2 to 7.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés sur lesquels : la figure 1 est une représentation d'une installation comprenant deux dispositifs d'enroulement selon l'invention, la figure 2 est une vue partielle d'un premier mode de réalisation d'un dispositif d'enroulement selon l'invention, la figure 3 est une vue partielle en coupe selon la ligne l-l de la figure 2, la figure 4 est une section d'une rainure hélicoïdale d'un deuxième mode de réalisation d'un dispositif d'enroulement selon l'invention, la figure 5 est une section partielle d'un tambour d'enroulement faisant partie d'une variante du deuxième mode de réalisation d'un dispositif d'enroulement selon l'invention, la figure 6 est une vue partielle en demi-coupe selon la ligne III- III de la figure 7 d'un troisième mode de réalisation d'un dispositif d'enroulement selon l'invention, la figure 7 est une vue partielle en coupe selon la ligne H-Il de la figure 6 du troisième mode de réalisation d'un dispositif d'enroulement selon l'invention.The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended drawings, in which: FIG. 1 is a representation of an installation comprising two winding devices according to the invention, FIG. 2 is a partial view of a first embodiment of a winding device according to the invention, FIG. 3 is a partial sectional view along line II of FIG. 2, FIG. 4 is a section of a helical groove of a second embodiment of a winding device according to the invention, FIG. 5 is a partial section of a winding drum forming part of a variant of the second embodiment of a winding device according to the invention, FIG. 6 is a partial view in half-section along the line III. FIG. 7 of a third embodiment of a winding device according to the invention, FIG. 7 is a partial sectional view along the line H-II of FIG. 6 of the third embodiment of FIG. a winding device according to the invention.
Le dispositif d'enroulement 10 de cordon 4 de suspension selon l'invention est destiné à être intégré dans une installation 1 telle que représentée à la figure 1. Cette installation peut être un store vénitien motorisé comprenant une barre de charge 2 et des lames orientables 3. La barre de charge 2 est reliée aux dispositifs d'enroulement 10 par deux cordons 4. Chaque dispositif d'enroulement 10 comprend un tambour 11 comportant une rainure hélicoïdale dans laquelle se loge le cordon correspondant 4 et un moyen de guidage 12 permettant de positionner le cordon dans la rainure. Les deux tambours 11 sont reliés entre eux par un arbre 5. Cet arbre 5 est entraîné en rotation par un moyen d'entraînement 6 qui peut être une commande manuelle ou un moteur. Un moyen d'orientation des lames peut également être prévu. Il peut être indépendant du dispositif d'enroulement ou y être associé. Généralement, les dispositifs d'enroulement 10 et le moyen d'entraînement 6 sont intégralement disposés à l'intérieur d'un caisson 7. Deux cinématiques sont possibles pour l'enroulement du cordon. Dans un premier cas, le moyen de guidage 12 est fixe et le tambour 11 , entraîné en rotation par l'arbre 5, est libre en translation axiale par rapport à cet arbre 5. Le moyen de guidage 12 comprend une forme fixe complémentaire à la rainure venant se loger dans celle-ci. Ainsi, lorsque le tambour tourne, celui-ci se déplace axialement en réaction de la rainure sur cette forme fixe. La deuxième alternative inverse la cinématique. Le moyen de guidage 12 devient mobile en translation mais bloqué en rotation alors que le tambour 11 devient fixe en translation mais toujours entraîné en rotation par l'arbre 5. Dans cette deuxième alternative, pour s'assurer que les extrémités des cordons suspendant le store se déplacent uniquement verticalement, on peut prévoir un système de renvoi des cordons, en utilisant, par exemple, des poulies.The winding cord 10 of the invention is intended to be integrated in an installation 1 as shown in FIG. 1. This installation can be a motorized venetian blind comprising a load bar 2 and orientable blades. 3. The load bar 2 is connected to the winding devices 10 by two cords 4. Each winding device 10 comprises a drum 11 having a helical groove in which is housed the corresponding bead 4 and a guide means 12 allowing position the cord in the groove. The two drums 11 are interconnected by a shaft 5. This shaft 5 is rotated by a drive means 6 which can be a manual control or a motor. Blade orientation means may also be provided. It can be independent of the winding device or be associated with it. Generally, the winding devices 10 and the driving means 6 are integrally arranged inside a box 7. Two kinematics are possible for the winding of the cord. In a first case, the guide means 12 is fixed and the drum 11, rotated by the shaft 5, is free in axial translation with respect to this shaft 5. The guide means 12 comprises a fixed shape complementary to the groove being housed in it. Thus, when the drum rotates, it moves axially in response to the groove on this fixed form. The second alternative reverses the kinematics. The guide means 12 becomes mobile in translation but locked in rotation while the drum 11 becomes fixed in translation but still rotated by the shaft 5. In this second alternative, to ensure that the ends of the cords suspending the blind move only vertically, one can provide a system for returning cords, using, for example, pulleys.
Le principe de l'invention est de prévoir dans une rainure du tambour un moyen de blocage solidaire du tambour. Ce moyen de blocage permet de maintenir volontairement le cordon dans la rainure du tambour. Dans le cas où le moyen de blocage exerce directement un effort sur le cordon, cet effort est contrôlé et déterminé. Par « solidaire », on entend que tout mouvement du tambour entraîne un mouvement du moyen de blocage. La liaison entre le moyen de blocage et le tambour est du type encastrement et est par exemple réalisée par moulage du tambour avec le moyen de blocage ou par tout autre moyen permettant de fixer le moyen de blocage sur le tambour. Ainsi, le moyen de blocage est solidaire du tambour en permanence.The principle of the invention is to provide in a groove of the drum a blocking means integral with the drum. This locking means makes it possible to deliberately hold the cord in the groove of the drum. In the case where the locking means exerts a direct force on the cord, this effort is controlled and determined. By "integral" is meant that any movement of the drum causes a movement of the locking means. The connection between the locking means and the drum is of the embedding type and is for example made by molding the drum with the locking means or by any other means for fixing the locking means on the drum. Thus, the locking means is integral with the drum permanently.
Les figures 2 et 3 représentent en détail un premier mode de réalisation du dispositif d'enroulement selon l'invention. Le cordon 4 est maintenu dans la rainure 11 R grâce à un ressort 13 hélicoïdal à angle d'hélice variable. En effet, les portions de spires entre lesquelles le cordon doit être coincé ont un angle d'hélice égal ou sensiblement égal à l'angle d'hélice de la rainure. Cependant, les portions complémentaires des spires ont un angle d'hélice différent de manière à ce que le pas du ressort soit égal au pas de la rainure. De préférence, l'angle d'hélice évolue de manière continue le long du ressort. Le ressort est logé dans un évidement 11 E du tambour 11. L'évidement s'étend par exemple axialement sur le tambour le long de la rainure. Le cordon 4 est rendu solidaire du tambour 11 du coté A par effet de pincement du cordon entre deux spires successives du ressort. Lorsque le tambour 11 tourne, le cordon 4 s'enroule autour de celui-ci en se plaçant dans la rainure 11 R. Le ressort 13 est dimensionné et positionné dans l'évidement 11 E de manière à ce que le cordon 4 soit serré entre deux spires du ressort 13 lorsqu'il le traverse. La rainure hélicoïdale 11 R est donc discontinue, entrecoupée d'espace correspondant à l'évidement 11 E. Quand le cordon traverse cet espace, il est pincé par deux spires du ressort 13 logé dans cet évidement. Plusieurs conditions sont ainsi nécessaires. L'écart entre deux spires successives est inférieur au diamètre du cordon. Le pas de l'hélice de la rainure est égal ou est un multiple du pas du ressort. Ainsi, si le rapport entre le pas de l'hélice de la rainure et le pas de l'hélice du ressort est n, le cordon se coincera dans le ressort toutes les n spires du ressort. Le rayon extérieur du ressort R13 ajouté à l'entraxe E entre le tambour 11 et le ressort 13 est préférentiellement supérieur ou égal au rayon extérieur d'enroulement du cordon Re4. De préférence, des moyens sont prévus pour empêcher la rotation du ressort par rapport à son axe relativement au tambour. D'autres ressorts peuvent être disposés sur la périphérie du tambour afin d'accroître le maintien du cordon. Avec ce type de conception, le ressort est interchangeable ce qui permet de mieux maîtriser l'effort de pincement et d'enrouler des cordons de différents diamètres (avec un dimensionnement de ressort adapté). Par exemple, une augmentation du diamètre du fil du ressort permet d'augmenter l'effort de pincement, l'interstice entre deux spires de ressort successives étant diminué et la rigidité du fil étant augmentée. Alternativement, le ressort peut être du type hélicoïdal à angle d'hélice constant. Dans ce cas, l'angle d'hélice du ressort est différent de celui de la rainure et, outre l'effet de coincement entre les spires du ressort, il existe un effet de chicane lors du passage du cordon de la rainure au ressort et/ou du ressort à la rainure.Figures 2 and 3 show in detail a first embodiment of the winding device according to the invention. The cord 4 is held in the groove 11 R by means of a helical spring 13 with a variable helix angle. Indeed, the portions of turns between which the bead must be stuck have a helix angle equal to or substantially equal to the angle of the groove. However, the complementary portions of the turns have a different helix angle so that the pitch of the spring is equal to the pitch of the groove. Preferably, the helix angle changes continuously along the spring. The spring is housed in a recess 11 E of the drum 11. The recess extends for example axially on the drum along the groove. The cord 4 is secured to the drum 11 on the side A by pinching effect of the cord between two successive turns of the spring. When the drum 11 rotates, the cord 4 wraps around it by placing itself in the groove 11 R. The spring 13 is dimensioned and positioned in the recess 11 E so that the cord 4 is clamped between two turns of the spring 13 when it passes through. The helical groove 11 R is discontinuous, interspersed with space corresponding to the recess 11 E. When the cord passes through this space, it is pinched by two turns of the spring 13 housed in this recess. Several conditions are thus necessary. The gap between two successive turns is smaller than the diameter of the cord. The pitch of the helix of the groove is equal to or is a multiple of the pitch of the spring. Thus, if the ratio between the pitch of the helix of the groove and the pitch of the spring helix is n, the bead will jam in the spring every n turns of the spring. The outer radius of the spring R13 added to the spacing E between the drum 11 and the spring 13 is preferably greater than or equal to the outside radius of winding of the cord Re4. Preferably, means are provided to prevent rotation of the spring relative to its axis relative to the drum. Other springs may be disposed on the periphery of the drum to increase the holding of the cord. With this type of design, the spring is interchangeable which allows to better control the clamping force and to wind cords of different diameters (with a suitable spring size). For example, an increase in the diameter of the spring wire increases the pinch force, the gap between two successive spring turns being decreased and the stiffness of the wire being increased. Alternatively, the spring may be of the helical type with a constant helix angle. In this case, the helix angle of the spring is different from that of the groove and, in addition to the wedging effect between the turns of the spring, there is a baffle effect when the cord goes from the groove to the spring and or from the spring to the groove.
La figure 4 représente un deuxième mode de réalisation du dispositif d'enroulement. Le cordon 4 est emprisonné dans une rainure hélicoïdale 11 R'. Dans ce mode de réalisation, les parois 20 de la section de la rainure se referment de manière à ce que le cordon ne puisse sortir de la section sans effort. Les parois 20 se referment par la présence à leurs extrémités extérieures de deux prolongements 21 s'étendant axialement. L'ouverture O de la rainure définie par la distance entre deux prolongements 21 de la rainure est inférieure au diamètre D4 du cordon. Ces prolongements 21 peuvent être continus tout au long de la rainure ou discontinus, sur des zones définies, tous les demi-tours par exemple.Figure 4 shows a second embodiment of the winding device. The cord 4 is trapped in a helical groove 11 R '. In this embodiment, the walls 20 of the section of the groove are closed so that the cord can not leave the section without effort. The walls 20 are closed by the presence at their outer ends of two extensions 21 extending axially. The opening O of the groove defined by the distance between two extensions 21 of the groove is smaller than the diameter D4 of the bead. These extensions 21 may be continuous throughout the groove or discontinuous, on defined areas, every half-turns, for example.
La section peut être fermée de manière permanente ou fermée une fois que le cordon 4 est dans la section, système de type fermeture éclair.The section can be closed permanently or closed once the cord 4 is in the section, zipper type system.
Une telle variante est décrite en référence à la figure 5. Dans cette variante, le tambour 11 présente une hélice 40 à section en L. Cette hélice peut être continue ou discontinue. Les spires ou les portions de spire sont reliées au moyeu du tambour 11 par des articulations 41. Elles sont bistables. Sur la figure 5, les deux portions représentées à gauche occupent une première position stable C et les deux portions représentées à droite occupent une deuxième position stable D. Des moyens (non représentés) permettent de faire basculer les portions entre les deux positions au fil de la rotation du tambour. La rainure d'enroulement du cordon est constituée par l'interstice entre les spires de l'hélice 40. L'interstice entre deux spires n'occupant pas une même position stable est beaucoup plus important que celui existant entre deux spires occupant des positions stables D. Ainsi, le cordon peut être retenu entre les différentes spires occupant la position D et peut quitter ou venir s'enrouler sans contrainte sur le tambour au niveau de l'interstice séparant deux spires n'occupant pas la même position. Dans cette variante, il n'y a pas besoin de déformer le tambour pour introduire le cordon dans la rainure.Such a variant is described with reference to FIG. 5. In this variant, the drum 11 has a helix 40 with an L section. This helix can be continuous or discontinuous. The turns or portions of turn are connected to the hub of the drum 11 by hinges 41. They are bistable. In FIG. 5, the two portions shown on the left occupy a first stable position C and the two portions represented on the right occupy a second stable position D. Means (not shown) make it possible to tilt the portions between the two positions over the rotation of the drum. The winding groove of the bead is formed by the gap between the turns of the propeller 40. The gap between two turns does not occupy the same stable position is much greater than that existing between two turns occupying stable positions D. Thus, the bead can be retained between the different turns occupying the position D and can leave or come to wind without stress on the drum at the level of interstice separating two turns not occupying the same position. In this variant, there is no need to deform the drum to introduce the cord into the groove.
Dans le deuxième mode de réalisation, le moyen de blocage peut seulement empêcher le cordon de sortir de la rainure. Le cordon est, dans ce cas, libre de mouvement à l'intérieur de la section de la rainure ce qui permet, avec une section adaptée, d'équiper le dispositif de cordons de différentes tailles.In the second embodiment, the blocking means can only prevent the bead from coming out of the groove. The cord is, in this case, free movement within the section of the groove which allows, with a suitable section, to equip the device cords of different sizes.
Un troisième mode de réalisation du dispositif d'enroulement est représenté aux figures 6 et 7. Le cordon est coincé par pincement entre des parois 11 P1 , 11 P2 latérales déformables d'une rainure 11 R". Lors de l'enroulement, le cordon 4 se place dans la rainure 11 R", comme décrit dans le premier mode de réalisation. En se positionnant dans la rainurel 1 R", le cordon va déformer les parois latérales 11 P1 , 11 P2 de la rainure jusqu'à ce que le cordon se plaque contre une butée, par exemple une nervure 11 N. L'enroulement est régulier, le diamètre intérieur d'enroulement est constant et correspond à la cote Rb4 de la butée. Les parois déformées appliquent, en retour, des efforts sur le cordon 4 qui, compte tenu du coefficient de frottement à l'interface cordon-parois, empêche le cordon de sortir de la rainure 11 R" tant qu'un effort radial d'une certaine intensité n'est pas atteint. Pour que l'effort exercé sur le cordon soit sensiblement constant tout le long de la rainure 11 R", un espace interstitiel 11 El est prévu entre deux parois consécutives. Les parois latérales 11 P1 et 11 P2 se déforment dans l'espace interstitiel par l'action du cordon. Cette déformation n'influe pas sur la pression exercée sur le cordon dans d'autres sections de la rainure. Il est préférable que la déformation de ces parois soit élastique. Avec ce mode de réalisation, lors du déroulement du cordon, le pincement permet de pousser celui-ci en dehors du caisson, c'est-à-dire, dans le caisson, le cordon reste dans la section de la rainure puis, sort de la section au niveau du moyen de guidage. Le risque de chevauchement est ainsi diminué. L'avantage d'un pincement continu est l'absence de partie lâche dans le caisson. Le risque de chevauchement est donc inexistant. D'autre part, dans ce mode de réalisation, le diamètre d'enroulement du cordon est constant, ce qui est primordial pour maintenir l'horizontalité d'une barre de charge mue par des tambours identiques.A third embodiment of the winding device is shown in Figures 6 and 7. The bead is pinched by clamping between walls 11 P1, 11 P2 deformable side of a groove 11 R ".When winding, the cord 4 is located in the groove 11 R ", as described in the first embodiment. By positioning in the groove 1 R ", the cord will deform the side walls 11 P1, 11 P2 of the groove until the cord is pressed against a stop, for example a rib 11 N. The winding is regular , the inner winding diameter is constant and corresponds to the Rb4 dimension of the abutment.The deformed walls apply, in return, efforts on the bead 4 which, taking into account the coefficient of friction at the cord-wall interface, prevents the cord out of the groove 11 R "as a radial force of a certain intensity is not achieved. In order for the force exerted on the bead to be substantially constant all along the groove 11 R ", an interstitial space 11 E1 is provided between two consecutive walls The side walls 11 P1 and 11 P2 deform in the interstitial space by the action of the cord.This deformation does not affect the pressure exerted on the cord in other sections of the groove. It is preferable that the deformation of these walls is elastic. With this embodiment, during the unfolding of the cord, the nip allows it to push it outside the box, that is to say, in the box, the cord remains in the groove section and then leaves the section at the guiding means. The risk of overlap is thus reduced. The advantage of a continuous pinch is the absence of loose parts in the box. The risk of overlap is therefore non-existent. On the other hand, in this embodiment, the winding diameter of the bead is constant, which is essential to maintain the horizontality of a load bar moved by identical drums.
De plus, en jouant sur l'élasticité des parois latérales et l'espace interstitiel, un tel tambour permet d'enrouler des cordons de différentes tailles. Préférentiellement, la rainure est en forme de « U ». Par « U », il faut entendre une section ayant deux parois latérales permettant d'appliquer une pression sur le cordon, les autres cotés pouvant prendre différentes formes.In addition, by acting on the elasticity of the side walls and the interstitial space, such a drum allows to wind cords of different sizes. Preferably, the groove is in the shape of a "U". By "U" is meant a section having two side walls for applying pressure on the cord, the other sides may take different forms.
Ainsi, l'invention propose un dispositif permettant de maintenir le cordon dans la rainure du tambour lors d'une manœuvre du store grâce à un moyen de blocage qui empêche le cordon de quitter la section de la rainure du tambour. Ce moyen étant solidaire du tambour, le risque de blocage du dispositif est alors diminué.Thus, the invention provides a device for holding the cord in the groove of the drum during a maneuvering the blind with a locking means which prevents the cord from leaving the section of the groove of the drum. This means being integral with the drum, the risk of blocking the device is then reduced.
Comme vu précédemment, le cordon peut être maintenu partiellement, c'est-à-dire qu'il n'est pas maintenu continuellement le long de la rainure. Un avantage peut être la simplification de la réalisation du tambour. Notamment dans les cas des deux premiers modes de réalisation, il serait préférable que les moyens de blocage soient disposés tous les demi-tours, pour faciliter le démoulage d'un éventuel tambour réalisé en plastique.As seen above, the cord can be partially held, that is to say it is not maintained continuously along the groove. One advantage may be the simplification of the realization of the drum. In particular in the case of the first two embodiments, it would be preferable for the locking means to be arranged every U-turns, to facilitate the demolding of a possible drum made of plastic.
Au sens de la présente demande, une rainure hélicoïdale standard prévue dans un tambour d'enroulement et dans laquelle le cordon se coincerait accidentellement ne constitue évidemment pas un moyen de blocage solidaire du tambour. For the purposes of the present application, a standard helical groove provided in a winding drum and in which the bead would accidentally jam is obviously not a locking means integral with the drum.

Claims

Revendications : Claims:
1. Dispositif (10) d'enroulement de cordon (4) de suspension de store comprenant : un tambour (11 ) d'enroulement sur lequel est fixée l'extrémité d'au moins un cordon de suspension, ledit tambour comportant une rainure hélicoïdale (11 R, 11 R', 11 R") disposée sur la surface extérieure du tambour et destinée à recevoir ledit cordon de suspension et - un moyen de guidage (12) permettant de positionner le cordon dans la rainure lors de l'enroulement, caractérisé en ce que le cordon est maintenu dans la rainure par un moyen de blocage (13 ; 21 ; 11 P1 , 11 P2) solidaire du tambour.A blind suspension cord winding device (10) comprising: a winding drum (11) to which is attached the end of at least one suspension cord, said drum having a helical groove (11 R, 11 R ', 11 R ") disposed on the outer surface of the drum and intended to receive said suspension cord and - guiding means (12) for positioning the cord in the groove during winding, characterized in that the cord is held in the groove by a locking means (13; 21; 11 P1, 11 P2) integral with the drum.
2. Dispositif selon la revendication 1 , caractérisé en ce que le maintien du cordon est obtenu par pincement du cordon.2. Device according to claim 1, characterized in that the maintenance of the cord is obtained by pinching the cord.
3. Dispositif selon la revendication 1 , caractérisé en ce que le cordon est libre de mouvement à l'intérieur de la rainure.3. Device according to claim 1, characterized in that the cord is free movement within the groove.
4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le moyen de blocage s'étend de manière discontinue le long de la rainure.4. Device according to one of the preceding claims, characterized in that the locking means extends discontinuously along the groove.
5. Dispositif selon la revendication 4, caractérisé en ce que le moyen de blocage est constitué d'au moins un ressort hélicoïdal (13), logé dans le tambour et dont le pas est sensiblement égal au pas de la rainure hélicoïdale (11 R). 5. Device according to claim 4, characterized in that the locking means is constituted by at least one helical spring (13), housed in the drum and whose pitch is substantially equal to the pitch of the helical groove (11 R) .
6. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que le moyen de blocage exerce une pression continue sensiblement uniforme sur chaque spire du cordon enroulée.6. Device according to one of claims 1 or 2, characterized in that the locking means exerts a substantially uniform continuous pressure on each turn of the coiled cord.
7. Dispositif selon la revendication 6, caractérisé en ce que le moyen de blocage comprend des parois latérales de la rainure, la section de la rainure étant en forme de « U », un interstice séparant deux sections consécutives situées à un pas d'intervalle. 7. Device according to claim 6, characterized in that the locking means comprises side walls of the groove, the section of the groove being in the form of a "U", a gap separating two consecutive sections located at a spacing interval .
PCT/IB2007/002901 2006-10-05 2007-10-01 Suspension cord winding device for a shutter WO2008041097A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07805013A EP2076651A2 (en) 2006-10-05 2007-10-01 Suspension cord winding device for a shutter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0608754 2006-10-05
FR0608754A FR2906834B1 (en) 2006-10-05 2006-10-05 STORE SUSPENSION CORD WINDING DEVICE.

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WO2008041097A2 true WO2008041097A2 (en) 2008-04-10
WO2008041097A3 WO2008041097A3 (en) 2008-07-03

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CN (1) CN101523008A (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2007713C2 (en) * 2011-11-03 2013-05-07 Coulisse Bv CORD-WRAPPING DEVICE FOR A SCREEN, SUCH AS A WINDOW COVER.
TWI491371B (en) * 2013-11-20 2015-07-11 洪銘澤 A retractor structure of curtain

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1286899A (en) * 1960-01-21 1962-03-09 Hunter Douglas International Improvements made to the device support to raise and lower a louver
US3181595A (en) * 1961-03-17 1965-05-04 Hunter Douglas Int Quebec Ltd Venetian blinds
DE1509779A1 (en) * 1963-12-19 1970-07-09 Kurt Roecker Venetian blind elevator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1286899A (en) * 1960-01-21 1962-03-09 Hunter Douglas International Improvements made to the device support to raise and lower a louver
US3181595A (en) * 1961-03-17 1965-05-04 Hunter Douglas Int Quebec Ltd Venetian blinds
DE1509779A1 (en) * 1963-12-19 1970-07-09 Kurt Roecker Venetian blind elevator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2007713C2 (en) * 2011-11-03 2013-05-07 Coulisse Bv CORD-WRAPPING DEVICE FOR A SCREEN, SUCH AS A WINDOW COVER.
EP2589743A1 (en) * 2011-11-03 2013-05-08 Coulisse B.V. Cord winding device for a screen, such as a window covering
TWI491371B (en) * 2013-11-20 2015-07-11 洪銘澤 A retractor structure of curtain
US9366076B2 (en) 2013-11-20 2016-06-14 Min-Che Hung Cord winding structure for window blind

Also Published As

Publication number Publication date
EP2076651A2 (en) 2009-07-08
WO2008041097A3 (en) 2008-07-03
CN101523008A (en) 2009-09-02
FR2906834B1 (en) 2008-12-19
FR2906834A1 (en) 2008-04-11

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